Ks0248 keyestudio Leonardo R3 Development Board

Introduction

The keyestudio Leonardo R3 development board is our newest easy-to-use open-source controller. It has twenty-three digital I/O ports, seven PWM ports and twelve analog input ports. Compared with other versions of Arduino using separate USB - Serial conversion chips, it only uses a single Atmega32u4 to achieve USB communication and control. The Atmega32u4's native support USB feature also enables Leonardo to simulate a mouse and keyboard.

Specifications

• Controller: ATmega32u4
• Working frequency: 16 MHz
• Working voltage: 5V
• Input voltage (recommended) : 7-12v
• Digital I/O port: 23
• PWM channel: 7
• Analog input: 12
• Maximum allowable current of 5V digital/analog port: 40 mA
• Maximum allowable current of 3.3V digital/analog port: 50 mA
• Flash Memory: 32 KB (ATmega32u4) of which 4 KB used by boot loader
• SRAM: 2.5 KB (ATmega32u4)
• EEPROM: 1 KB (ATmega32u4)

Other related instructions

• Digital IO port: 23 (D0 - D13, D14-MISO, D15-SCK, D16-MOSI, D18-23 [A0-A5])

• Analog input: 12 (A0 - A5, D4 - A6, D6 - A7, D8 - A8, D9 - A9, D10 - A10, D12-A11)

• Serial communication: D0 (RX) and D1 (TX)

• IIC communication: D2 (SDA) and D3 (SCL)

• External interrupt: D3 (interrupt 0), D2 (interrupt 1), D0 (interrupt 2), D1 (interrupt 3) and D7 (interrupt 4)

• PWM port: D3, D5, D6, D9, D10, D11 and D13

• SPI: ICSP pins.Support SPI communication by using the SPI library. It is important to note that SPI pins do not connect to any number I/O pins like UNO, they can only work on the ICSP port.This means that if your expansion board has no ICSP pin connected to the 6 feet, it will not work.

• LED: 13. There is a built-in LED on the digital pin 13. When the pins are high level, LED is bright;when the pins are low level,the LED is not bright.